Using Fuzzy Code Search to Link Code Fragments in Discussions to Source Code

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Using Fuzzy Code Search to Link Code Fragments in Discussions to Source Code

  1. 1. Using Fuzzy Code Search to LinkCode Fragments in Discussions to Source CodeNicolas Bettenburg Stephen W. Thomas Ahmed E. Hassan Queen’s University Software Analysis and Intelligence Lab (SAIL) Kingston, Ontario, Canada
  2. 2. “Given enough eyeballs, all bugs are shallow.” Eric S. Raymond - The Cathedral and the Bazaar 2
  3. 3. Objective in this Study:Which parts of the source code did developers discuss? 3
  4. 4. Objective in this Study: Which parts of the source code did developers discuss?Finding Associations of Discussions with Source Code Files 3
  5. 5. Communication Source Code Repository Archive 4
  6. 6. Communication Source Code Repository Archive 4
  7. 7. Untitled 12-03-15 2:55 PM Untitled 12-03-15 2:55 PM this.opt_withObsolete = opt_withObsolete; Untitled } 12-03-15 2:55 PM /* (non-Javadoc) this.opt_withObsolete = opt_withObsolete; * @see main.IExperiment#getDescription() Untitled 12-03-15 2:55 PM } */ public String getDescription() { /* (non-Javadoc) String description = "We want to run an experiment all those bug this.opt_withObsolete = opt_withObsolete; * @see main.IExperiment#getDescription() reports.nt" } */ + "We extract the complete stacktrace information to study fix public String getDescription() { location and stacktrace interplay.nt"; /* (non-Javadoc) String description = "We want to run an experiment all those bug this.opt_withObsolete = opt_withObsolete; return description; * @see main.IExperiment#getDescription() reports.nt" } } */ + "We extract the complete stacktrace information to study fix public String getDescription() { location and stacktrace interplay.nt"; /* (non-Javadoc) /* (non-Javadoc) String description = "We want to run an experiment all those bug return description; * @see main.IExperiment#getDescription() * @see main.IExperiment#run() reports.nt" } */ */ + "We extract the complete stacktrace information to study fix public String getDescription() { public boolean run() { location and stacktrace interplay.nt"; /* (non-Javadoc) String description = "We want to run an experiment all those bug final boolean return = Main.isCli_withDebugMessages(); DEBUG description; * @see main.IExperiment#run()reports.nt" } */ + "We extract the complete stacktrace information to study fix // Select an appropriate database name on the server depending on the public boolean run() { location and stacktrace interplay.nt"; project demanded via command line options /* (non-Javadoc) final boolean return = Main.isCli_withDebugMessages(); DEBUG description; String dbName = ""; * @see main.IExperiment#run() } if (Main.getCli_project().equalsIgnoreCase("eclipse")) */ // Select an appropriate database name on the server depending on the dbName = "eclipse-december-2007"; public boolean run() { project demanded via command line options /* (non-Javadoc) else { final boolean DEBUG = Main.isCli_withDebugMessages(); String dbName = ""; * @see main.IExperiment#run() System.out.println("We currently only support the Eclipse database if (Main.getCli_project().equalsIgnoreCase("eclipse")) */ !"); // Select an appropriate database name on the server depending on the dbName = "eclipse-december-2007"; public boolean run() { System.exit(0); project demanded via command line options else { final boolean DEBUG = Main.isCli_withDebugMessages(); } String dbName = ""; System.out.println("We currently only support the Eclipse database if (Main.getCli_project().equalsIgnoreCase("eclipse")) !"); // Select an appropriate database name on the server depending on the dbName = "eclipse-december-2007"; System.exit(0); project demanded via command line options // Create the else {Database Connection } String dbName = ""; DatabaseConnector System.out.println("We currently only support the Eclipse database dbc = new DatabaseConnector(Main.getCli_dbHost(), if (Main.getCli_project().equalsIgnoreCase("eclipse")) Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); !"); dbName = "eclipse-december-2007"; dbc.initialize(); System.exit(0); // Create the else { Database Connection if (!dbc.connect()) { } DatabaseConnector System.out.println("We currently only support the Eclipse database dbc = new DatabaseConnector(Main.getCli_dbHost(), System.out.println("Could not connect to database. Check host, port Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); !"); , username and password."); dbc.initialize(); System.exit(0); System.exit(1); // Create the Database Connection if (!dbc.connect()) { } } DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), System.out.println("Could not connect to database. Check host, port Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); , username and password."); // Fetch a number of Bug Report unique IDs belonging to the following dbc.initialize(); System.exit(1); // Create the Database Connection query if (!dbc.connect()) { } DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), String setSelectionQuery = "SELECT DISTINCT not connect to database. Check host, port System.out.println("Could bug_id FROM bugzilla_bugs Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); WHERE bug_id > " + Main.getCli_startID() + " ORDER BY bug_id ASC , username and password."); // Fetch a number of Bug Report unique IDs belonging to the following dbc.initialize(); LIMIT " + Main.getCli_amount(); System.exit(1); query if (!dbc.connect()) { int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); } String setSelectionQuery = "SELECT DISTINCT not connect to database. Check host, port System.out.println("Could bug_id FROM bugzilla_bugs int lastID = bugIDs[bugIDs.length -1]; WHERE bug_id > " + Main.getCli_startID() + " ORDER BY bug_id ASC , username and password."); // Fetch a number of Bug Report unique IDs belonging to the following LIMIT " + Main.getCli_amount(); System.exit(1); if (DEBUG) query int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); } System.out.println("* Attempting to fetch " + bugIDs.length + " bugzilla_bugs String setSelectionQuery = "SELECT DISTINCT bug_id FROM int lastID = bugIDs[bugIDs.length -1]; reports from " + Main.getCli_dbHost() + " starting +with ID " BY bug_id ASC WHERE bug_id > " + Main.getCli_startID() " ORDER + // Fetch a number of Bug Report unique IDs belonging to the following Main.getCli_startID()); LIMIT " + Main.getCli_amount(); if (DEBUG) query int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); System.out.println("* Attempting to fetch " + bugIDs.length + " bugzilla_bugs String setSelectionQuery = "SELECT DISTINCT bug_id FROM // Collect the bug reports bugIDs[bugIDs.length -1];up to 100 parallel int lastID = from the database using reports from " + Main.getCli_dbHost() + " starting +with ID " BY bug_id ASC WHERE bug_id > " + Main.getCli_startID() " ORDER + threads. Main.getCli_startID()); LIMIT " + Main.getCli_amount(); if (DEBUG) int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); System.out.println("* Attempting to fetch " + bugIDs.length + " // Collect the bug reports bugIDs[bugIDs.length -1];up to 100 parallel int lastID = from the database using reports from " + Main.getCli_dbHost() + " starting with ID " + threads. Main.getCli_startID()); if (DEBUG) System.out.println("* Attempting to fetch " + bugIDs.length + " // Collect the bug reports from the database using up to 100Page 2 of 4 parallel reports from " + Main.getCli_dbHost() + " starting with ID " + threads. Main.getCli_startID()); // Collect the bug reports from the database using up to 100Page 2 of 4 parallel threads. Page 2 of 4 Page 2 of 4Communication Source Code Repository Archive 4
  8. 8. Untitled 12-03-15 2:55 PM Untitled 12-03-15 2:55 PM this.opt_withObsolete = opt_withObsolete; Untitled } 12-03-15 2:55 PM /* (non-Javadoc) this.opt_withObsolete = opt_withObsolete; * @see main.IExperiment#getDescription() Untitled 12-03-15 2:55 PM } */ public String getDescription() { /* (non-Javadoc) String description = "We want to run an experiment all those bug this.opt_withObsolete = opt_withObsolete; * @see main.IExperiment#getDescription() reports.nt" } */ + "We extract the complete stacktrace information to study fix public String getDescription() { location and stacktrace interplay.nt"; /* (non-Javadoc) String description = "We want to run an experiment all those bug this.opt_withObsolete = opt_withObsolete; return description; * @see main.IExperiment#getDescription() reports.nt" } } */ + "We extract the complete stacktrace information to study fix public String getDescription() { location and stacktrace interplay.nt"; /* (non-Javadoc) /* (non-Javadoc) String description = "We want to run an experiment all those bug return description; * @see main.IExperiment#getDescription() * @see main.IExperiment#run() reports.nt" } */ */ + "We extract the complete stacktrace information to study fix public String getDescription() { public boolean run() { location and stacktrace interplay.nt"; /* (non-Javadoc) String description = "We want to run an experiment all those bug final boolean return = Main.isCli_withDebugMessages(); DEBUG description; * @see main.IExperiment#run()reports.nt" } */ + "We extract the complete stacktrace information to study fix // Select an appropriate database name on the server depending on the public boolean run() { location and stacktrace interplay.nt"; project demanded via command line options /* (non-Javadoc) Traceability final boolean return = Main.isCli_withDebugMessages(); DEBUG description; String dbName = ""; * @see main.IExperiment#run() } if (Main.getCli_project().equalsIgnoreCase("eclipse")) */ // Select an appropriate database name on the server depending on the dbName = "eclipse-december-2007"; public boolean run() { project demanded via command line options /* (non-Javadoc) else { final boolean DEBUG = Main.isCli_withDebugMessages(); String dbName = ""; * @see main.IExperiment#run() System.out.println("We currently only support the Eclipse database if (Main.getCli_project().equalsIgnoreCase("eclipse")) */ !"); // Select an appropriate database name on the server depending on the dbName = "eclipse-december-2007"; public boolean run() { System.exit(0); project demanded via command line options else { final boolean DEBUG = Main.isCli_withDebugMessages(); } String dbName = ""; System.out.println("We currently only support the Eclipse database if (Main.getCli_project().equalsIgnoreCase("eclipse")) !"); // Select an appropriate database name on the server depending on the dbName = "eclipse-december-2007"; System.exit(0); project demanded via command line options // Create the else {Database Connection } String dbName = ""; DatabaseConnector System.out.println("We currently only support the Eclipse database dbc = new DatabaseConnector(Main.getCli_dbHost(), if (Main.getCli_project().equalsIgnoreCase("eclipse")) Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); !"); dbName = "eclipse-december-2007"; dbc.initialize(); System.exit(0); // Create the else { Database Connection if (!dbc.connect()) { } DatabaseConnector System.out.println("We currently only support the Eclipse database dbc = new DatabaseConnector(Main.getCli_dbHost(), System.out.println("Could not connect to database. Check host, port Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); !"); , username and password."); dbc.initialize(); System.exit(0); Links System.exit(1); // Create the Database Connection if (!dbc.connect()) { } } DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), System.out.println("Could not connect to database. Check host, port Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); , username and password."); // Fetch a number of Bug Report unique IDs belonging to the following dbc.initialize(); System.exit(1); // Create the Database Connection query if (!dbc.connect()) { } DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), String setSelectionQuery = "SELECT DISTINCT not connect to database. Check host, port System.out.println("Could bug_id FROM bugzilla_bugs Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); WHERE bug_id > " + Main.getCli_startID() + " ORDER BY bug_id ASC , username and password."); // Fetch a number of Bug Report unique IDs belonging to the following dbc.initialize(); LIMIT " + Main.getCli_amount(); System.exit(1); query if (!dbc.connect()) { int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); } String setSelectionQuery = "SELECT DISTINCT not connect to database. Check host, port System.out.println("Could bug_id FROM bugzilla_bugs int lastID = bugIDs[bugIDs.length -1]; WHERE bug_id > " + Main.getCli_startID() + " ORDER BY bug_id ASC , username and password."); // Fetch a number of Bug Report unique IDs belonging to the following LIMIT " + Main.getCli_amount(); System.exit(1); if (DEBUG) query int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); } System.out.println("* Attempting to fetch " + bugIDs.length + " bugzilla_bugs String setSelectionQuery = "SELECT DISTINCT bug_id FROM int lastID = bugIDs[bugIDs.length -1]; reports from " + Main.getCli_dbHost() + " starting +with ID " BY bug_id ASC WHERE bug_id > " + Main.getCli_startID() " ORDER + // Fetch a number of Bug Report unique IDs belonging to the following Main.getCli_startID()); LIMIT " + Main.getCli_amount(); if (DEBUG) query int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); System.out.println("* Attempting to fetch " + bugIDs.length + " bugzilla_bugs String setSelectionQuery = "SELECT DISTINCT bug_id FROM // Collect the bug reports bugIDs[bugIDs.length -1];up to 100 parallel int lastID = from the database using reports from " + Main.getCli_dbHost() + " starting +with ID " BY bug_id ASC WHERE bug_id > " + Main.getCli_startID() " ORDER + threads. Main.getCli_startID()); LIMIT " + Main.getCli_amount(); if (DEBUG) int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); System.out.println("* Attempting to fetch " + bugIDs.length + " // Collect the bug reports bugIDs[bugIDs.length -1];up to 100 parallel int lastID = from the database using reports from " + Main.getCli_dbHost() + " starting with ID " + threads. Main.getCli_startID()); if (DEBUG) System.out.println("* Attempting to fetch " + bugIDs.length + " // Collect the bug reports from the database using up to 100Page 2 of 4 parallel reports from " + Main.getCli_dbHost() + " starting with ID " + threads. Main.getCli_startID()); // Collect the bug reports from the database using up to 100Page 2 of 4 parallel threads. Page 2 of 4 Page 2 of 4Communication Source Code Repository Archive 4
  9. 9. 5
  10. 10. 5
  11. 11. org.eclipse.swt/Eclipse_SWT/win32/org/eclipse/swt/widgets/Button.java 5
  12. 12. 3 Approaches in the Past Change Log Analysis Information Retrieval Lightweight Textual Analysis 6
  13. 13. Change Log Analysis Untitled 12-03-15 2:55 PM this.opt_withObsolete = opt_withObsolete; } /* (non-Javadoc) * @see main.IExperiment#getDescription() */ public String getDescription() { String description = "We want to run an experiment all those bug reports.nt" + "We extract the complete stacktrace information to study fix location and stacktrace interplay.nt"; return description; } /* (non-Javadoc) * @see main.IExperiment#run() LUCENE-2297: allow reader */ public boolean run() { final boolean DEBUG = Main.isCli_withDebugMessages(); // Select an appropriate database name on the server depending on the Untitled 12-03-15 2:55project demanded via command line options PM String dbName = ""; if (Main.getCli_project().equalsIgnoreCase("eclipse")) dbName = "eclipse-december-2007"; else { System.out.println("We currently only support the Eclipse database !"); this.opt_withObsolete = opt_withObsolete; System.exit(0); } } /* (non-Javadoc) * @see main.IExperiment#getDescription() // Create the Database Connection */ DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), public String getDescription() { Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); String description = "We want to run an experiment all those bug dbc.initialize(); reports.nt" if (!dbc.connect()) { pooling to be enabled (through + "We extract the complete stacktrace information to study fix System.out.println("Could not connect to database. Check host, port location and stacktrace interplay.nt"; , username and password."); return description; System.exit(1); } } /* (non-Javadoc) // Fetch a number of Bug Report unique IDs belonging to the following * @see main.IExperiment#run() query */ String setSelectionQuery = "SELECT DISTINCT bug_id FROM bugzilla_bugs public boolean run() { WHERE bug_id > " + Main.getCli_startID() + " ORDER BY bug_id ASC final boolean DEBUG = Main.isCli_withDebugMessages(); LIMIT " + Main.getCli_amount(); int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); // Select an appropriate database name on the server depending on the int lastID = bugIDs[bugIDs.length -1]; project demanded via command line options String dbName = ""; if (DEBUG) if (Main.getCli_project().equalsIgnoreCase("eclipse")) System.out.println("* Attempting to fetch " + bugIDs.length + " dbName = "eclipse-december-2007"; reports from " + Main.getCli_dbHost() + " starting with ID " + else { Main.getCli_startID()); System.out.println("We currently only support the Eclipse database !"); // Collect the bug reports from the database using up to 100 parallel System.exit(0); threads. } IndexWriterConfig) even if Untitled // Create the DatabasePM 12-03-15 2:55 Connection Untitled DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), 12-03-15 2:55 PM Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); dbc.initialize(); Page 2 of 4 if (!dbc.connect()) { System.out.println("Could not connect to database. Check host, port this.opt_withObsolete = opt_withObsolete; , username and password."); } System.exit(1); this.opt_withObsolete = opt_withObsolete; } } /* (non-Javadoc) * @see main.IExperiment#getDescription() // Fetch a number of Bug Report unique IDs belonging to the following /* (non-Javadoc) */ query * @see main.IExperiment#getDescription() public String getDescription() { String setSelectionQuery = "SELECT DISTINCT bug_id FROM */bugzilla_bugs WHERE bug_id > " + Main.getCli_startID() + " ORDER public String getDescription() { String description = "We want to run an experiment all those bug BY bug_id ASC reports.nt" LIMIT " + Main.getCli_amount(); String description = "We want to run an experiment all those bug int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); + "We extract the complete stacktrace information to study fix reports.nt" location and stacktrace interplay.nt"; int lastID = bugIDs[bugIDs.length -1]; + "We extract the complete stacktrace information to study fix return description; location and stacktrace interplay.nt"; if (DEBUG) youre not pulling NRT reader. } return description; System.out.println("* Attempting to fetch " + bugIDs.length + " } /* (non-Javadoc) reports from " + Main.getCli_dbHost() + " starting with ID " + * @see main.IExperiment#run() Main.getCli_startID()); /* (non-Javadoc) */ * @see main.IExperiment#run() public boolean run() { // Collect the bug reports from the database using up to 100 parallel */ final boolean DEBUG = Main.isCli_withDebugMessages(); threads. public boolean run() { final boolean DEBUG = Main.isCli_withDebugMessages(); // Select an appropriate database name on the server depending on the project demanded via command line options // Select an appropriate database name on the server depending on the String dbName = ""; project demanded via command line options if (Main.getCli_project().equalsIgnoreCase("eclipse")) String dbName = ""; dbName = "eclipse-december-2007"; if (Main.getCli_project().equalsIgnoreCase("eclipse")) Page 2 of 4 else { dbName = "eclipse-december-2007"; System.out.println("We currently only support the Eclipse database else { !"); System.out.println("We currently only support the Eclipse database System.exit(0); !"); } System.exit(0); } // Create the Database Connection DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), // Create the Database Connection Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), dbc.initialize(); Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); if (!dbc.connect()) { dbc.initialize(); System.out.println("Could not connect to database. Check host, port if (!dbc.connect()) { , username and password."); System.out.println("Could not connect to database. Check host, port System.exit(1); , username and password."); } System.exit(1); } // Fetch a number of Bug Report unique IDs belonging to the following query // Fetch a number of Bug Report unique IDs belonging to the following String setSelectionQuery = "SELECT DISTINCT bug_id FROM bugzilla_bugs query WHERE bug_id > " + Main.getCli_startID() + " ORDER BY bug_id ASC String setSelectionQuery = "SELECT DISTINCT bug_id FROM bugzilla_bugs LIMIT " + Main.getCli_amount(); WHERE bug_id > " + Main.getCli_startID() + " ORDER BY bug_id ASC int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); LIMIT " + Main.getCli_amount(); int lastID = bugIDs[bugIDs.length -1]; int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); int lastID = bugIDs[bugIDs.length -1]; if (DEBUG) System.out.println("* Attempting to fetch " + bugIDs.length + " if (DEBUG) reports from " + Main.getCli_dbHost() + " starting with ID " + System.out.println("* Attempting to fetch " + bugIDs.length + " Main.getCli_startID()); reports from " + Main.getCli_dbHost() + " starting with ID " + Main.getCli_startID()); // Collect the bug reports from the database using up to 100 parallel threads. // Collect the bug reports from the database using up to 100 parallel threads. SVN Page 2 of 4 Page 2 of 4 7
  14. 14. Change Log Analysis Untitled 12-03-15 2:55 PM this.opt_withObsolete = opt_withObsolete; } /* (non-Javadoc) * @see main.IExperiment#getDescription() */ public String getDescription() { String description = "We want to run an experiment all those bug reports.nt" + "We extract the complete stacktrace information to study fix location and stacktrace interplay.nt"; return description; } /* (non-Javadoc) * @see main.IExperiment#run() LUCENE-2297: allow reader */ public boolean run() { final boolean DEBUG = Main.isCli_withDebugMessages(); // Select an appropriate database name on the server depending on the Untitled 12-03-15 2:55project demanded via command line options PM String dbName = ""; if (Main.getCli_project().equalsIgnoreCase("eclipse")) dbName = "eclipse-december-2007"; else { System.out.println("We currently only support the Eclipse database !"); this.opt_withObsolete = opt_withObsolete; System.exit(0); } } /* (non-Javadoc) * @see main.IExperiment#getDescription() // Create the Database Connection */ DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), public String getDescription() { Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); String description = "We want to run an experiment all those bug dbc.initialize(); reports.nt" if (!dbc.connect()) { pooling to be enabled (through + "We extract the complete stacktrace information to study fix System.out.println("Could not connect to database. Check host, port location and stacktrace interplay.nt"; , username and password."); return description; System.exit(1); } } /* (non-Javadoc) // Fetch a number of Bug Report unique IDs belonging to the following * @see main.IExperiment#run() query */ String setSelectionQuery = "SELECT DISTINCT bug_id FROM bugzilla_bugs public boolean run() { WHERE bug_id > " + Main.getCli_startID() + " ORDER BY bug_id ASC final boolean DEBUG = Main.isCli_withDebugMessages(); LIMIT " + Main.getCli_amount(); int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); // Select an appropriate database name on the server depending on the int lastID = bugIDs[bugIDs.length -1]; project demanded via command line options String dbName = ""; if (DEBUG) if (Main.getCli_project().equalsIgnoreCase("eclipse")) System.out.println("* Attempting to fetch " + bugIDs.length + " dbName = "eclipse-december-2007"; reports from " + Main.getCli_dbHost() + " starting with ID " + else { Main.getCli_startID()); System.out.println("We currently only support the Eclipse database !"); // Collect the bug reports from the database using up to 100 parallel System.exit(0); threads. } IndexWriterConfig) even if Untitled // Create the DatabasePM 12-03-15 2:55 Connection Untitled DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), 12-03-15 2:55 PM Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); dbc.initialize(); Page 2 of 4 if (!dbc.connect()) { System.out.println("Could not connect to database. Check host, port this.opt_withObsolete = opt_withObsolete; , username and password."); } System.exit(1); this.opt_withObsolete = opt_withObsolete; } } /* (non-Javadoc) * @see main.IExperiment#getDescription() // Fetch a number of Bug Report unique IDs belonging to the following /* (non-Javadoc) */ query * @see main.IExperiment#getDescription() public String getDescription() { String setSelectionQuery = "SELECT DISTINCT bug_id FROM */bugzilla_bugs WHERE bug_id > " + Main.getCli_startID() + " ORDER public String getDescription() { String description = "We want to run an experiment all those bug BY bug_id ASC reports.nt" LIMIT " + Main.getCli_amount(); String description = "We want to run an experiment all those bug int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); + "We extract the complete stacktrace information to study fix reports.nt" location and stacktrace interplay.nt"; int lastID = bugIDs[bugIDs.length -1]; + "We extract the complete stacktrace information to study fix return description; location and stacktrace interplay.nt"; if (DEBUG) youre not pulling NRT reader. } return description; System.out.println("* Attempting to fetch " + bugIDs.length + " } /* (non-Javadoc) reports from " + Main.getCli_dbHost() + " starting with ID " + * @see main.IExperiment#run() Main.getCli_startID()); /* (non-Javadoc) */ * @see main.IExperiment#run() public boolean run() { // Collect the bug reports from the database using up to 100 parallel */ final boolean DEBUG = Main.isCli_withDebugMessages(); threads. public boolean run() { final boolean DEBUG = Main.isCli_withDebugMessages(); // Select an appropriate database name on the server depending on the project demanded via command line options // Select an appropriate database name on the server depending on the String dbName = ""; project demanded via command line options if (Main.getCli_project().equalsIgnoreCase("eclipse")) String dbName = ""; dbName = "eclipse-december-2007"; if (Main.getCli_project().equalsIgnoreCase("eclipse")) Page 2 of 4 else { dbName = "eclipse-december-2007"; System.out.println("We currently only support the Eclipse database else { !"); System.out.println("We currently only support the Eclipse database System.exit(0); !"); } System.exit(0); } // Create the Database Connection DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), // Create the Database Connection Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); DatabaseConnector dbc = new DatabaseConnector(Main.getCli_dbHost(), dbc.initialize(); Main.getCli_dbUser(), Main.getCli_dbPass(), dbName); if (!dbc.connect()) { dbc.initialize(); System.out.println("Could not connect to database. Check host, port if (!dbc.connect()) { , username and password."); System.out.println("Could not connect to database. Check host, port System.exit(1); , username and password."); } System.exit(1); } // Fetch a number of Bug Report unique IDs belonging to the following query // Fetch a number of Bug Report unique IDs belonging to the following String setSelectionQuery = "SELECT DISTINCT bug_id FROM bugzilla_bugs query WHERE bug_id > " + Main.getCli_startID() + " ORDER BY bug_id ASC String setSelectionQuery = "SELECT DISTINCT bug_id FROM bugzilla_bugs LIMIT " + Main.getCli_amount(); WHERE bug_id > " + Main.getCli_startID() + " ORDER BY bug_id ASC int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); LIMIT " + Main.getCli_amount(); int lastID = bugIDs[bugIDs.length -1]; int[] bugIDs = dbc.getIdSetByQuery(setSelectionQuery); int lastID = bugIDs[bugIDs.length -1]; if (DEBUG) System.out.println("* Attempting to fetch " + bugIDs.length + " if (DEBUG) reports from " + Main.getCli_dbHost() + " starting with ID " + System.out.println("* Attempting to fetch " + bugIDs.length + " Main.getCli_startID()); reports from " + Main.getCli_dbHost() + " starting with ID " + Main.getCli_startID()); // Collect the bug reports from the database using up to 100 parallel threads. // Collect the bug reports from the database using up to 100 parallel threads. SVN Page 2 of 4 Page 2 of 4 7

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